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Abstract:

Embodiments of the disclosed technology provide a three dimensional (3D)
display panel and a method of manufacturing a phase difference plate. The
3D display panel comprises: a display panel which comprises a first
substrate and a second substrate facing each other, the first substrate
comprising a first polarizer, the second substrate comprising a second
polarizer; and a phase difference plate which is directly disposed on a
surface of the first substrate on an opposite side of the second
substrate.

Claims:

1. A three dimensional (3D) display panel, comprising: a display panel
which comprises a first substrate and a second substrate facing each
other, the first substrate comprising a first polarizer, the second
substrate comprising a second polarizer; and a phase difference plate
which is directly disposed on a surface of the first substrate on an
opposite side of the second substrate.

2. The 3D display panel of claim 1, wherein the first substrate comprises
a first base substrate, the first polarizer is located on a side of the
first base substrate facing the second substrate, and the phase
difference plate is disposed on a surface of the first base substrate on
an opposite side of the second substrate.

3. The 3D display panel of claim 2, wherein the first substrate is a
color filter substrate, the first substrate further comprises a color
filter layer, and the color filter layer and the first polarizer are
formed on a side of the first base substrate facing the second substrate
in this sequence or an inverse sequence.

4. The 3D display panel of claim 1, wherein the phase difference plate
comprises an alignment layer, the alignment layer is directly disposed on
a surface of the first substrate on an opposite side of the second
substrate, and the alignment layer is divided into a plurality of regions
with at least two different alignment directions.

5. The 3D display panel of claim 4, wherein the alignment layer is
divided into a plurality of regions with two different alignment
directions.

6. The 3D display panel of claim 5, wherein an angle between the two
different alignment directions is 45.degree. to 135.degree..

7. The 3D display panel of claim 6, wherein an angle between the two
different alignment directions is 90.degree..

8. The 3D display panel of claim 7, wherein, among the two different
alignment directions, one alignment direction is parallel to a
polarization direction of light emitted from the upper polarizer, and
another alignment direction is perpendicular to the polarization
direction of the light emitted from the upper polarizer.

9. The 3D display panel of claim 4, wherein regions with different
alignment directions of the alignment layer are vertical or horizontal
bar-like regions, and every two adjacent bar-like regions have different
alignment directions.

10. The 3D display panel of claim 4, wherein the phase difference plate
further comprises a layer of reactive mesogens disposed on a surface of
the alignment layer, and the reactive mesogens is a substance having a
birefringence characteristic and capable of being aligned and solidified.

11. A method of manufacturing a phase difference plate, comprising the
following steps: S1: applying an alignment layer on a surface of an upper
substrate of a display panel; S2: performing an alignment treatment on
the alignment layer, so as to divide the alignment layer into a plurality
of regions with at least two different alignment directions; and S3:
applying a layer of reactive mesogens on the alignment layer subjected to
the alignment treatment, and have the reactive mesogens aligned and
solidified, so as to form the phase difference plate.

12. The method of manufacturing a phase difference plate of claim 11,
wherein, in the step S2, the alignment treatment is performed on the
alignment layer, so as to divide the alignment layer into the plurality
of regions with two different alignment directions.

13. The method of manufacturing a phase difference plate of claim 12,
wherein an angle between the two different alignment directions is
45.degree. to 135.degree..

14. The method of manufacturing a phase difference plate of claim 13,
wherein an angle between the two different alignment directions is
90.degree..

15. The method of manufacturing a phase difference plate of claim 14,
wherein, among the two different alignment directions, one alignment
direction is parallel to a polarization direction of light emitted from
the upper polarizer of the display panel, and another alignment direction
is perpendicular to the polarization direction of the light emitted from
the upper polarizer.

16. The method of manufacturing a phase difference plate of claim 11,
wherein, in the step S2, after the alignment treatment is performed on
the alignment layer, the alignment layer is divided into a number of
vertical or horizontal bar-like regions, and every two adjacent bar-like
regions have different alignment directions.

17. The method of manufacturing a phase difference plate of claim 11,
wherein the reactive mesogens is a substance having a birefringence
characteristic and capable of being aligned and solidified.

18. The method of manufacturing a phase difference plate of claim 11,
wherein the display panel further comprises a lower substrate facing the
upper substrate, the upper substrate comprises a base substrate and a
polarizer, the polarizer is located on a side of the base substrate
facing the lower substrate, and the alignment layer is applied on a
surface of the base substrate on an opposite side of the lower substrate.

19. The method of manufacturing a phase difference plate of claim 18,
wherein the upper substrate is a color filter substrate, the upper
substrate further comprises a color filter layer, and the color filter
layer and the polarizer are formed on a side of the base substrate facing
the lower substrate in this sequence or an inverse sequence.

Description:

BACKGROUND

[0001] Embodiments of the disclosed technology relate to a three
dimensional (3D) display panel and a method of manufacturing a phase
difference plate.

[0002] Stereoscopic display has become a trend of the display field. And,
the hypostasis of the stereoscopic display is to produce a stereoscopic
effect by utilizing a parallax, i.e., a left-eye picture is seen by the
left eye of a person, and a right-eye picture is seen by his right eye.
The left-eye and right-eye pictures are a pair of stereoscopic images
having the parallax.

[0003] One mode to achieve the stereoscopic display is of a serial type,
i.e., at a first time, a left-eye picture is displayed on a display and
the displayed picture is only seen by the left eye of a viewer at this
time; and at a second time, a right-eye picture is displayed on the
display and the displayed picture is only seen by the right eye of the
viewer. The pictures will be retained on retinas of human eyes for a
period of time, so as to give the person a feeling that the left-eye and
right-eye pictures are simultaneously seen by the left and right eyes.
Thus, a stereoscopic sensation is produced.

[0004] Another mode to achieve the stereoscopic display is of a parallel
type, i.e., at the same time, content for a left-eye picture is displayed
by a part of pixels on a display, and content for a right-eye picture is
displayed by a part of pixels. The displayed right-eye picture only can
be seen by the right eye and the displayed left-eye picture only can be
seen by the left eye through devices such as gratings, polarized glasses,
so as to produce the stereoscopic sensation.

[0005] Polarized glasses type stereoscopic display is a currently
mainstream technology in the field of stereoscopic display, and the basic
structure of this technology is to install a device for adjusting a
polarization direction of light being emitted in front of a display
panel. The device may be a phase difference plate, a liquid crystal cell,
or other device capable of adjusting the polarization direction of the
light emitted from different pixels. The principle of stereoscopic
display of the phase difference plate is as shown in FIG. 1, and from top
to bottom, there are: a picture displayed by the display panel, a phase
difference plate, a picture formed by the light passing through the phase
difference plate, and polarized glasses for viewing. On the display
panel, a right-eye picture is shown in a row, and a left-eye picture is
shown in a row. A phase difference plate is disposed in front of the
display panel, one row has a λ/2 retardation (λ is the
wavelength of light), and one row has a zero retardation. The light
emitted from pixels for the portion having the λ/2 retardation
rotates, after passing through the phase difference plate, 90° in
its polarization direction. Thus, only a light emitted by right-eye
pixels can be seen by the right eye and only a light emitted by left-eye
pixels can be seen by the left eye when polarized glasses, polarization
directions of which for the left and right eyes are perpendicular to each
other, are put on, so as to produce the stereoscopic effect.
Alternatively, one row has a λ/4 retardation and one row has a
3λ/4 retardation in a scheme.

[0006] In various polarized glasses stereoscopic displays, a technology in
which a phase difference plate is employed is the most favorite. Its
basic structure is that, the phase difference plate is attached to the
display panel after being precisely aligned thereto. Different phase
retardations can be produced in different regions on the phase difference
plate, so that light from different pixels is emitted in different
polarization directions and a viewer can see a 3D effect when wearing
polarized glasses.

[0007] Currently, a method of manufacturing a 3D display panel based on a
phase difference plate is: firstly, the phase difference plate is
produced on a substrate (e.g., a glass or a thin film substance) for the
phase difference plate, and then the phase difference plate is attached
to the display panel with a double-side tape or other adhesives. Its base
structure is as shown in FIG. 2. A phase difference plate 2, which is
produced on a substrate 211 for the phase difference plate, is adhered to
an upper polarizer 112 of a display panel 1 with an adhesive 212.

[0008] Problems present in the above manufacture process of the phase
difference plate lie in that, when the phase difference plate is aligned
and attached to the display panel, it is always difficult to align
precisely and the accuracy is very low, leading to a very low yield and
severe crosstalk for a 3D product which is manufactured in this manner;
moreover, as a layer of the adhesive 212 and the substrate 211 for the
phase difference plate are added, loss of light will occur; and a
distance from a light emitting point (red, green and blue light emitting
points on a display substrate) to the phase difference plate is
increased, thereby reducing the viewing angle. These problems have
severely hindered the development of the phase difference plate type 3D
display.

SUMMARY

[0009] An embodiment of the disclosed technology provides a three
dimensional (3D) display panel, comprising: a display panel which
comprises a first substrate and a second substrate facing each other, the
first substrate comprising a first polarizer, the second substrate
comprising a second polarizer; and a phase difference plate which is
directly disposed on a surface of the first substrate on an opposite side
of the second substrate.

[0010] Another embodiment of the disclosed technology provides a method of
manufacturing a phase difference plate, comprising the following steps:
S1: applying an alignment layer on a surface of an upper substrate of a
display panel; S2: performing an alignment treatment on the alignment
layer, so as to divide the alignment layer into a plurality of regions
with at least two different alignment directions; and S3: applying a
layer of reactive mesogens on the alignment layer subjected to the
alignment treatment, and have the reactive mesogens aligned and
solidified, so as to form the phase difference plate.

[0011] Further scope of applicability of the disclosed technology will
become apparent from the detailed description given hereinafter. However,
it should be understood that the detailed description and specific
examples, while indicating preferred embodiments of the disclosed
technology, are given by way of illustration only, since various changes
and modifications within the spirit and scope of the disclosed technology
will become apparent to those skilled in the art from the following
detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The disclosed technology will become more fully understood from the
detailed description given hereinafter and the accompanying drawings
which are given by way of illustration only, and thus are not limitative
of the disclosed technology and wherein:

[0013] FIG. 1 is a schematic view showing the principle of achieving a 3D
display by employing a phase difference plate in prior art;

[0014] FIG. 2 is a schematic view showing a structure in which a phase
difference plate is attached to a polarizer in an attachment manner in
prior art;

[0015] FIG. 3A is a schematic view showing a structure of a 3D display
panel in which a phase difference plate is produced on a surface of an
upper substrate;

[0016] FIG. 3B is a schematic view showing a second structure of a 3D
display panel in which a phase difference plate is produced on a surface
of an upper substrate;

[0017] FIG. 3C is a schematic view showing a third structure of a 3D
display panel in which a phase difference plate is produced on a surface
of an upper substrate;

[0018] FIG. 3D is a schematic view showing a further structure of a 3D
display panel in which a phase difference plate is produced on a surface
of an upper substrate;

[0019]FIG. 4 is a schematic view showing a structure of a phase
difference plate which is obtained after an alignment layer is produced
on an upper substrate;

[0020] FIGS. 5A and 5B are top views showing an alignment manner of an
alignment layer of a phase difference plate according to an embodiment of
the disclosed technology, in which, FIG. 5A, aligned bar-like regions are
vertically disposed, and in FIG. 5B, aligned bar-like regions are
horizontally disposed;

[0021] FIG. 6 is a schematic view showing a structure of a phase
difference plate which is obtained after a RM is applied on an alignment
layer, according to an embodiment of the disclosed technology;

[0022]FIG. 7 is a schematic view obtained after an alignment layer for a
phase difference plate is produced on an upper substrate, in which, the
alignment layer is divided into a number of vertical bar-like regions,
(a) is a top view, and (b) is sectional view taken along the line A-A;

[0023]FIG. 8 is a schematic view obtained after a reactive mesogens (RM)
is applied onto the alignment layer of the model shown in FIG. 7, (a) is
a top view, and (b) is sectional view taken along the line A-A;

[0024] FIG. 9 is a schematic view obtained after a plurality of panels on
a mother plate shown in FIG. 8 are cut apart to obtain a single panel,
(a) is a top view, and (b) is sectional view taken along the line A-A;

[0025] FIG. 10 is schematic view obtained after an alignment layer for a
phase difference plate is produced on an upper substrate, in which, the
alignment layer is divided into a number of horizontal bar-like regions,
(a) is a top view, and (b) is sectional view taken along the line B-B;

[0026] FIG. 11 is a schematic view obtained after a reactive mesogens (RM)
is applied onto the alignment layer of the model shown in FIG. 10, (a) is
a top view, and (b) is sectional view taken along the line B-B;

[0027] FIG. 12 is a schematic view obtained after a plurality of panels on
a mother plate shown in FIG. 11 are cut apart to obtain a single panel,
(a) is a top view, and (b) is sectional view taken along the line B-B;
and

[0028] FIG. 13 is a view showing an effect when viewing of a 3D picture is
achieved by means of utilizing a phase difference plate.

DETAILED DESCRIPTION

[0029] Embodiments of the disclosed technology now will be described more
clearly and fully hereinafter with reference to the accompanying
drawings, in which the embodiments of the disclosed technology are shown.
Apparently, only some embodiments of the disclosed technology, but not
all of embodiments, are set forth here, and the disclosed technology may
be embodied in other forms. All of other embodiments made by those
skilled in the art based on embodiments disclosed herein without mental
work fall within the scope of the disclosed technology.

Embodiment 1

[0030] In the embodiment, a three dimensional (3D) display panel
comprising a liquid crystal panel and a phase difference plate is
provided, the liquid crystal panel comprising an upper substrate and a
lower substrate facing each other, a liquid crystal layer filled between
the upper substrate and the lower substrate, and other components. The
upper substrate comprises an upper polarizer, and the lower substrate
comprises a lower polarizer. The phase difference plate directly covers
an upper surface of the upper substrate of the liquid crystal panel. In
general, the upper substrate is a color filter substrate, and the lower
substrate is an array substrate. The upper substrate comprises a base
substrate, a color filter layer and so on, and the lower substrate
comprises a base substrate, an array layer and so on. However, the
structure and the components of the upper and lower substrates may change
according to practical situation. The base substrate of the upper
substrate and the base substrate of the lower substrate each can be a
glass substrate or other transparent substrate, such as a plastic
substrate, etc. It can be understood by those skilled in the art that,
when the upper polarizer or the lower polarizer is located inside the
upper substrate or the lower substrate, they constitute a part of the
upper substrate or the lower substrate actually. For illustrative
convenience, according to embodiments of the disclosed technology, the
polarizers (the upper and lower polarizers) are described as components
dependent from the upper and lower substrates somewhere without causing
confusion and misunderstanding. Note that, only the 3D display panel and
components of the liquid crystal panel concerning the disclosed
technology are described and illustrated, and other components irrelevant
to the design point of the disclosed technology, such as a PI layer
(alignment layer) of the liquid crystal panel, a common electrode layer
of the color filter substrate, etc. are not described and illustrated.

[0031] FIG. 3A is a typical schematic view of the embodiment. In the
embodiment, a phase difference plate 2 directly covers an upper surface
of an upper substrate 11 of a liquid crystal panel 1. Specifically, the
phase difference plate 2 is directly disposed on a base substrate 111 of
the upper substrate 11 actually. In the 3D display panel shown in FIG.
3A, the liquid crystal panel 1 comprises the upper substrate 11, a lower
substrate 12 and a liquid crystal layer 13 filled therebetween. The upper
substrate 11 comprises the base substrate 111, an upper polarizer 112 and
a color filter layer 113. The upper polarizer 112 is located between the
base substrate 111 and the color filter layer 113. The lower substrate 12
comprises a base substrate 121, a lower polarizer 122 and an array layer
123, and the lower polarizer 122 is located between the base substrate
121 and the array layer 123.

[0032] FIG. 3B is another typical schematic view of the embodiment.
Likewise, a phase difference plate 2 directly covers an upper surface of
an upper substrate 11 of a liquid crystal panel 1, i.e., is directly
disposed on a base substrate 111 of the upper substrate 11. In the 3D
display panel shown in FIG. 3B, the liquid crystal panel 1 comprises the
upper substrate 11, a lower substrate 12 and a liquid crystal layer 13
filled therebetween. The lower substrate 12 is identical to that of the
embodiment shown in FIG. 3A, and comprises a base substrate 121, a lower
polarizer 122 and an array layer 123, and the lower polarizer 122 is
located between the base substrate 121 and the array layer 123. The 3D
display panel shown in FIG. 3B differs from that shown in FIG. 3A in
that, in FIG. 3B, the upper substrate 11 still comprises the base
substrate 111, the upper polarizer 112 and the color filter layer 113,
but the color filter layer 113 is formed on the base substrate 111 and
the upper polarizer 112 is located at a lower surface of the color filter
layer 113.

[0033] FIG. 3C is a further typical schematic view of the embodiment.
Likewise, a phase difference plate 2 directly covers an upper surface of
an upper substrate 11 of the liquid crystal panel 1, i.e., is directly
disposed on a base substrate 111 of the upper substrate 11. In the 3D
display panel shown in FIG. 3C, the liquid crystal panel 1 comprises the
upper substrate 11, a lower substrate 12 and a liquid crystal layer 13
filled therebetween. Unlike the embodiments shown in FIG. 3A and FIG. 3B,
in the 3D display panel shown in FIG. 3C, the liquid crystal panel 1 is a
liquid crystal panel with a Color filter On Array (COA) configuration.
The COA means that a color filter layer (RGB), which is generally
produced on an upper substrate (a color filter substrate), is formed on
an array substrate. As shown in FIG. 3C, in the embodiment, the upper
substrate 11 of the liquid crystal panel 1 comprises the base substrate
and the upper polarizer 112, and the upper polarizer 112 is directly
formed at a lower surface of the base substrate 111. The lower substrate
12 comprises from down to up, a base substrate 121, a lower polarizer
122, an array layer 123 and a color filter layer 113 in sequence, i.e.
the lower polarizer 122 is still located between the base substrate 121
and the array layer 123.

[0034] In FIGS. 3A, 3B and 3C, positions of the upper polarizer 112 in the
liquid crystal panel 1 differs from one another, but the position of the
lower polarizer 122 in the liquid crystal panel 1 does not change and is
always between the base substrate 121 and the array layer 123. Actually,
the position of the lower polarizer 122 is not limited to such a
position, and the lower polarizer 122 may be set in different positions
inside and outside of the liquid crystal panel. For example, it is still
set at a lower surface of the lower substrate 12 according to the
conventional method. FIG. 3D illustrates one of these schemes.

[0035] It should be understood by those skilled in the art that, FIGS. 3A
to 3D does not illustrate all of the components of the liquid crystal
panel 1; and, the liquid crystal panel 1 may be in a common TN mode, may
also be in a horizontal electric field mode, VA mode or other electric
field mode.

[0036] Hereinbefore, besides pertaining to the configuration of the phase
difference plate on the liquid crystal panel, the configuration of the 3D
display panel provided by the embodiment mainly relates to the
configuration of the liquid crystal panel, and especially relates to the
arrangement scheme of the upper polarizer and the lower polarizer. Change
can be made by those skilled in the art on the basis of the above
contents without departing from the design idea and protection scope of
the disclosed technology. Thereinafter, the configuration of the phase
difference plate of the 3D display panel provided by the embodiment will
now be explained in detail.

[0037] The phase difference plate 2 in the embodiment comprises an
alignment layer, and the alignment layer is divided into a plurality of
regions with at least two different alignment directions, as shown in
FIG. 4, which is a schematic sectional view obtained after an alignment
layer 21 is formed on the upper substrate 111.

[0038] Specifically, the alignment layer is divided into a number of
bar-like regions, and every two adjacent bar-like regions have different
alignment directions. The bar-like regions may extend in a horizontal
direction, a vertical direction or any other directions, and preferably,
extend in the horizontal direction. FIGS. 5A and 5B are schematic top
view of the alignment layer when the bar-like regions are in the
horizontal direction and in the vertical direction, respectively.
Moreover, bar-like regions of different types may be alternately arranged
in sequence, and may be arranged in a chessboard shape or in other
shapes.

[0039] To ensure the display effect, each row (column) of sub-pixels can
only be covered by one kind of bar-regions (i.e. regions with the same
alignment direction), and each bar-like region may cover a part or all of
one row (or column) of the sub-pixels, or may also cover more than one
row (or column) of the sub-pixels. Preferably, each bar-like region
covers exactly one row (or column) of the sub-pixels. The case where
horizontal bar-like regions are used on the phase difference plate is
superior to the case where vertical bar-like regions are used in terms of
the viewing effect, and thus, most preferably, horizontal bar-like
regions are used on the phase difference plate, and each of the bar-like
regions covers exactly one row of the sub-pixels.

[0040] The plurality of regions have at least two different alignment
directions, and preferably, have two different alignment directions. In
the case where the regions have two different alignment directions, an
angle between the two different alignment directions may be 45° to
135°. Preferably, the angle between the alignment directions is
90°. Further, one of the alignment directions is parallel to a
polarization direction of light emitted from the upper polarizer, and
another alignment direction is perpendicular to the polarization
direction of light emitted from the upper polarizer. The above preferable
angle between alignment directions is set as 90°, which is a
preferable design on the premise that an angle between polarization
directions for two lenses of existing polarized glasses is 90°. It
can be understood by those skilled in the art that, in the embodiment, a
3D display effect can be realized only if polarization directions for the
upper polarizer of the display panel, the phase difference plate and the
polarized glasses match with one another. In the case where the angle
between polarization directions for two lenses of the polarized glasses
is not 90° (for example, may also be 60°), the angle
between alignment directions is preferably not 90° (for example,
may also be 60°), either.

[0041] Practically, function of the phase difference plate can be realized
by the alignment layer itself, and thus, the phase difference plate 2
according to the embodiment may also include the alignment layer only.
Further, in order to enable the phase difference plate to achieve a
better effect, a layer of reactive mesogens (RM) 22 may further cover a
surface of the alignment layer of the phase difference plate according to
the embodiment, as shown in FIG. 6. Herein, the RM is generally referred
as a reactive substance or RM reactant. The RM has a birefringence
characteristic and is a kind of substance capable of being aligned and
solidified. Specifically, the RM is a liquid crystal polymer or other
suitable substance. Preferably, the RM is a liquid crystal polymer. The
RM is aligned under the influence of the alignment layer directly
thereunder. The solidified RM has the same alignment direction as a
region of the alignment layer directly thereunder. Thus, in
correspondence with different regions of the alignment layer, the
solidified RM is also formed into a plurality of regions with different
alignment directions.

[0042] A 3D display device comprising the above 3D display panel is also
provided by the embodiment. The 3D display device may be a television,
notebook computer, PSP or other electronic device.

[0043] The 3D display panel and the 3D display device in the embodiment
have advantages of low production cost and good display effect.

Embodiment 2

[0044] A method of manufacturing a phase difference plate according to the
embodiment comprises the following steps:

[0045] Step S301, applying an alignment layer for the phase difference
plate on a surface of an upper substrate of a display panel.
Specifically, the surface of the upper substrate of the display panel is
actually a surface of a base substrate of the upper substrate.
Preferably, material for the alignment layer may not react with material
for the upper surface of the upper substrate, and has a stronger adhesion
to it. The polarizer concerned in each embodiment of the disclosed
technology (including an upper polarizer and a lower polarizer), refers
to an optical device capable of achieving a function of light
polarization, including but not limited to the conventional polarizer.

[0046] Step S302, performing an alignment treatment on the alignment layer
to divide the alignment layer into a plurality of regions having at least
two different alignment directions. A specific manner of the alignment
treatment is as follows: a mask is disposed on the alignment layer, and
the alignment treatment is performed with irradiation of UV light, so as
to divide the exposed alignment layer into the plurality of regions
having different alignment directions. Of course, except for the above
method of utilizing the UV light irradiation, the specific manners of the
alignment treatment can also be other conventional methods in the field.
In the embodiment, for example, it is possible to divide the alignment
layer into a plurality of regions having two different alignment
directions. A specific manner of the alignment treatment is as follows: a
mask is disposed on the alignment layer, and the alignment treatment is
performed with irradiation of UV light, so as to divide the exposed
alignment layer into the plurality of regions having two different
alignment directions. For example, an angle between the two alignment
directions may be 45° to 135°. Preferably, the angle
between the alignment directions is 90°. Further, one of the
alignment directions is parallel to a polarization direction of light
emitted from the upper polarizer, and another alignment direction is
perpendicular to the polarization direction of light emitted from the
upper polarizer. The above angle between polarization directions is
preferably set as 90°, which is a preferable design on the premise
that the angle between the polarization directions for different lenses
of existing polarized glasses is 90°. It can be understood by
those skilled in the art that, in the embodiment, a 3D display effect can
be realized only if polarization directions for the upper polarizer of
the display panel, the phase difference plate and the polarized glasses
match with one another. In the case where the angle between polarization
directions for the polarized glasses is not 90° (for example, may
also be 60°), the angle between different alignment directions is
preferably not 90° (for example, may also be 60°), either.

[0047] The two kinds of regions, which have different alignment
directions, of the alignment layer may be two regions with different
alignments in any form. For example, a number of bar-like regions with a
certain alignment angle are formed on the upper substrate, and every two
adjacent bar-like regions have different alignment directions. The
bar-like regions may extend in a horizontal direction, a vertical
direction or any other directions. Bar-like regions of different types
(i.e. bar-like regions with different alignment directions) may be
alternately arranged in sequence, and may be arranged in a chessboard
shape or in other shapes. For the purpose of productive convenience, in
the embodiment, the alignment layer is divided into a number of vertical
bar-like regions, and alignment directions for every two adjacent
bar-like regions are different. The process method may also be executed
for a single panel alone. As a plurality of panels are produced on a
mother plate in a general panel production, the process method may also
be executed for the plurality of panels on the mother plate. A case in
which four panels are produced is shown in FIG. 7. As shown in FIG. 7,
(a), (b) in FIG. 7 illustrates an alignment layer 21 applied on an upper
surface of the upper substrate (specifically, an upper surface of a base
substrate 111 of the upper substrate), which is subjected to alignment.
The alignment layer 21 is divided into a number of vertical bar-like
regions and every two adjacent bar-like regions have different alignment
directions. To ensure the display effect, each column of sub-pixels only
can be covered by one kind of bar-regions (i.e., regions having one
alignment direction), and each bar-like region may cover a part or all of
one column of the sub-pixels, or may also cover more than one column of
the sub-pixels. Preferably, each bar-like region covers exactly one
column of the sub-pixels.

[0048] Step S303, applying a RM layer on the alignment layer subjected to
the alignment treatment, and solidifying the RM layer after being
aligned, so as to form the phase difference plate. In the embodiment, RM
is a liquid crystal polymer. As shown in (a) and (b) of FIG. 8, RM layer
22 is applied on the alignment layer 21. As the RM 22 is affected by the
alignment direction of the alignment layer 21 before it is solidified,
the alignment direction of the RM 22 after being solidified is consistent
with the alignment direction of the alignment layer 21, so as to form the
phase difference plate 2. FIG. 9 shows a case of a single panel after
cutting. Due to lack of protection from a substrate for the phase
difference plate, in order to avoid the phase difference plate from being
scratched during cutting or carrying, a step of attaching a protective
film on a surface of the phase difference plate can further be included
after step S303.

Embodiment 3

[0049] As shown in FIGS. 10, 11 and 12, the difference between the present
embodiment and embodiment 2 lies in that, in step S302, an alignment
layer is divided into a number of horizontal bar-like regions after an
alignment treatment is performed on the alignment layer, and every two
adjacent bar-like regions have different alignment directions. That is,
bar-like regions with different alignment directions are arranged
alternately in a vertical direction. To ensure the display effect, each
row of sub-pixels can only be covered by one kind of the bar-like regions
(i.e., regions with one alignment direction), and each bar-like region
may cover a part or all of one row of the sub-pixels, or may also cover
more than one row of the sub-pixels. Preferably, to obtain a better
display effect, each bar-like region covers exactly one row of the
sub-pixels.

[0050] The case where horizontal bar-like regions are used on the phase
difference plate is superior to the case where vertical bar-like regions
are used in terms of the viewing effect. As shown in FIG. 13, one pixel
is shown merely as an example to illustrate the viewing effect of user.
As shown, a number of bar-like regions are in front of the one pixel.
Letting the pixel provides content for a left-eye picture, a light
emitted from the pixel via a left oblique line can be selected by a
polarized lens for the left eye, and a light emitted from the pixel via a
right oblique line will cause a crosstalk. As can be seen in the figure,
if regions with different alignment directions are in a horizontal
bar-like shape, an OK region and a crosstalk region occur alternately in
a vertical direction; and if regions with different alignment directions
are in a vertical bar-like shape, the OK region and the crosstalk region
occur alternately in a horizontal direction. Human eyes are located
horizontally and they have fewer opportunities to move up or down and
have more opportunities to move to left or right. Therefore, if the
vertical bar-like regions are used on the phase difference plate, the OK
region and the crosstalk region will occur alternately in the horizontal
direction, causing that a phenomenon that the right eye is located in the
crosstalk region when the left eye is in the OK region, or enters into
the crosstalk region if the eyes move slightly, so as to affect the
viewing. If the horizontal bar-like regions are used on the phase
difference plate, the OK region and the crosstalk region will occur
alternately in the vertical direction. As such, both eyes will always
fall into the OK region provided that a person sits in a place.

[0051] In the practice, there is always a case of screen overturning, and
the picture will be overturned along with it, especially for some
handheld terminal products. After overturned, the bar-like regions of the
phase difference plate may become vertical from horizontal, or become
horizontal from vertical. Therefore, the 3D display effects achieved by
embodiments 2 and 3 may interchange.

Embodiment 4

[0052] A method of manufacturing a 3D display panel is provided by the
embodiment. The method comprises producing an upper polarizer inside a
liquid crystal panel upon formation of the liquid crystal panel; and
further comprises producing a phase difference plate by using the method
of manufacturing the phase difference plate as described in embodiment 2
or 3. Herein, producing the upper polarizer inside the liquid crystal
panel comprises producing the upper polarizer at a surface for different
layers, such as, a surface of a base substrate, a surface of a color
filter layer, etc., of an upper substrate of the liquid crystal panel.

[0053] A method of manufacturing a 3D display panel is further provided by
the embodiment. The method comprises producing an upper polarizer between
a base substrate and a color filter layer of an upper substrate of a
liquid crystal panel upon formation of the liquid crystal panel; and
further comprises producing a phase difference plate by using the method
of manufacturing the phase difference plate as described in embodiment 2
or 3. The configuration of the 3D display panel produced by this method
may be the same as that shown in FIG. 3A. Certainly, the position of a
lower polarizer may further change, for example, to be the same as that
shown in FIG. 3D.

[0054] A method of manufacturing a 3D display panel is further provided by
the embodiment. The method comprises producing an upper polarizer at a
lower surface of a color filter layer of an upper substrate of a liquid
crystal panel upon formation of the liquid crystal panel; and further
comprises producing a phase difference plate by using the method of
manufacturing the phase difference plate as described in embodiment 2 or
3. The configuration of the 3D display panel produced by this method may
be the same as that shown in FIG. 3B. Certainly, the position of a lower
polarizer may further change.

[0055] A method of manufacturing a 3D display panel is further provided by
the embodiment. The method comprises: upon formation of the liquid
crystal panel, forming a lower substrate which comprises a base
substrate, an array layer and a color filter layer, forming an upper
substrate which comprises a base substrate, and producing an upper
polarizer at a lower surface of the base substrate of the upper substrate
of the liquid crystal panel; and further comprises producing a phase
difference plate by using the method of manufacturing the phase
difference plate as described in embodiment 2 or 3. The configuration of
the 3D display panel produced by this method may be the same as that
shown in FIG. 3C. Certainly, the position of a lower polarizer may
further change.

[0056] As seen from above, the method of manufacturing the phase
difference plate provided by embodiments 2 and 3 can be used to
manufacture 3D display panels in various forms as set forth in embodiment
1. For the 3D display panels produced by the above methods, the alignment
accuracy of the phase difference plate with the display panel and the
yield of the product are enhanced, and use of a substrate for the phase
difference plate and an adhesive is reduced, to thereby decrease the
cost, and meanwhile reduce the loss of transmissive light and increase
the viewing angle. These panels have advantages of low production cost,
good display effect, and so on.

[0057] It should be noted that the above embodiments only have the purpose
of illustrating the disclosed technology, but not limiting it. Although
the disclosed technology has been described with reference to the above
embodiment, those skilled in the art should understand that modifications
or alternations can be made to the solution or the technical feature in
the described embodiments without departing from the spirit and scope of
the disclosed technology.